bug.h

#ifndef __ASM_CRISv10_ARCH_BUG_H#define __ASM_CRISv10_ARCH_BUG_H#include <linux/stringify.h>#ifdef CONFIG_BUG#ifdef CONFIG_DEBUG_BUGVERBOSE/* The BUG() macro is used for marking obviously incorrect code paths. * It will cause a message with the file name and line number to be printed, * and then cause an oops. The message is actually printed by handle_BUG() * in arch/cris/kernel/traps.c, and the reason we use this method of storing * the file name and line number is that we do not want to affect the registers * by calling printk() before causing the oops. */#define BUG_PREFIX 0x0D7F#define BUG_MAGIC 0x00001234struct bug_frame {
unsignedshort prefix;
unsignedint magic;
unsignedshort clear;
unsignedshort movu;
unsignedshort line;
unsignedshort jump;
unsignedchar *filename;
};
#if 0/* Unfortunately this version of the macro does not work due to a problem * with the compiler (aka a bug) when compiling with -O2, which sometimes * erroneously causes the second input to be stored in a register... */#define BUG() \ __asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\ "movu.w %0,$r0\n\t" \ "jump %1\n\t" \ : : "i" (__LINE__), "i" (__FILE__))#else/* This version will have to do for now, until the compiler is fixed. * The drawbacks of this version are that the file name will appear multiple * times in the .rodata section, and that __LINE__ and __FILE__ can probably * not be used like this with newer versions of gcc. */#define BUG() \ __asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\ "movu.w " __stringify(__LINE__) ",$r0\n\t"\ "jump 0f\n\t" \ ".section .rodata\n" \ "0:\t.string \"" __FILE__ "\"\n\t" \ ".previous")#endif#else/* This just causes an oops. */#define BUG() (*(int *)0 = 0)#endif#define HAVE_ARCH_BUG#endif#include <asm-generic/bug.h>#endif